Means for separating dust from moist gases



July 8, 1930. J. B. TAYLOR 1,770,020

uns rox ssrm'rnie ws'r n'lol lors! casus l Filed Aug. 2o. :1921s vParental, July s, 1930 UNITED sTATEs PATENT OFFICE i vJosnmirn. TAYLOR, or ALLEnDALn'NEw JERSEY' MEANS ron snrm'rme Dusr Fael: nors'r GASES l Appiicationllea Angus@ eo, 192s. serial-Ano. 1so,4so.

The present invention relates tod a means for t separating inely divided solid matter from anV aeriform current containing more or less steam or vapor. -f

5. Various manufacturing `processes are known in which more or less valuable material is carried away in-a finely divided condition together with steamer vaporA by which it is entrained and there hashitherto been devised no completely successful method for recovering this dust from the entraining stream. i Y

Where aV dust'and vapor carrying stream of this character is passed through a dust collector lintended for separating dust from dry air or gas, there is such Va condensation `03E moisture vwithin the'apparatu's as' to interfere with its. successfuloperation, causing a deposit of liquid in the dust collecting member and in the conveyor usually employed to remove the collected dust.-

Myinvention, broadly speaking, comprises the utilization` of suicient heat applied to the parts of the dust collector to keep the .tem-l .perature always well above the dew point. VIn

this manner have found that the'working conditions within the ap aratus are such that I separation of the entraxned dust is entirely successful.

One'of the various instances in which my invention is useful is 1n connection with apparatus for removingthewater of crystallization from gypsum, and I have explained the -invention hereinafter in `connection with this particular apparatus, although it is to be understood'that my inventionis not limited to this specificapplicationthereof.

My invention is illustrated in the above named.V connection in theY accompanying vwater of crystallization, the walls of the furf nace used for this purpose being shown dia- '50 grammatically @$211,

drawing vwherein Figure lis a diagrammatic;

At 12 is shown the flue leading to the stack Y 13, bywhich the furnace gases are led away.`

A dust collector of any desired form (for instance that, set lforth in my Patent #1,527,- 235 dated February, 24, 1925) is'indicated at 55 14, the same having a dust receiving member 15, from which the dust is taken out by a screw conveyor 16 o r the like. Y

A `jacketing casing 17 is `constructed around the conveyor, and preferably around the dust receiving bin or member 15 as well, in such a manner as to leave a material spacebetween such casin and the walls of the apparatus surrounde thereby.

At 18 is shown the blower or fan by means 65 of which the moist gases from the kettle 10 are drawn through 'the conduit 19,and 'the collector, as indicated bythe arrows. Y

In order to carry out my improved process, I supply a current of air or gas, passing through4 the jacketing space, such air or gas having a temperature suilicient to, revent condensation of moisture within 'the co ector. The preferred kconstruction for this purpose is shown in the drawing and comprises a pipe 20 leading fromthe stack or flue of the furnace' 11 to the jacketing space, and -a similar pipe 21, leading from the jacketingspace to the anlS. I preferably form the pipe^20" with two branches, as shown, leading to the twosides of, the lower ar't of the jacketing 'memben 'The partic ar arrangement of the pipes 20 and 21 is A not material.

In the specific type of apparatus herein shown by way of example, the vaponbearin A i stream passing through .the-conduit 19 woul have a temperature of somewhere about 250 degrees Fahrenheit. Such astream, meeting therelatively cold parts within the dust collector, would condense, and a thick moist -mud would fall into the bin 15.

The gases drawn by Vthe Vfan 18 through the pipes 20, the 'jacket 17 and the pipe 21 v leave the stack 13 atv a much higher temperature-sayve or six hundred heit. In consequence allthe arts of the conveyor proper are kept so hot t at'the moisturev drawn* from the kettle 10- is'not allowed to condense at lany point, and su sep ma@ of the-aniram Solid l. l

degrees Fahren 95 A variety' of apparatus, and many mo which is'not limited to the details herein shown and described.

What I claim is- A dust separator, and a current-producing device Y adapted to draw a gaseous stream therethrough, a jacketing means around the.

separator, and means for conveying hot gases through the jacket andthe current-producing device.

In 4testimony whereof I have hereto laixed ny signature on this 13th day of August 1 26.

JOSEPH B. TAYLOR.

zo ,i

of my invention, 

